<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>state</title>
  <style>

  </style>
</head>

<body>
<!-- 创建test -->
<div id="test"></div>
<!-- 引入核心库 -->
<script src="../js/react.development.js"></script>
<!-- 引入react操作DOM支持库 -->
<script src="../js/react-dom.development.js"></script>
<!-- 引入babel 用于将jsx转为js -->
<script src="../js/babel.min.js"></script>
<script type="text/babel">  // 此处引入一定要写babel
// 1.创建组件
class Weather extends React.Component {
  constructor(props) {
    super(props);
    // 初始化状态
    this.state = {
      isHot: true,
    }
    this.changeWhiter = this.changeWhiter.bind(this);
  }
  render() {
    const { isHot } = this.state;
    return (
      <h1 onClick={ this.changeWhiter }>今天天气很{ isHot ? '炎热' : '寒冷' }</h1>
    )
  }
  changeWhiter () {
    // 状态不可以直接更改,要借助一个内置的API setState
    const isHot = this.state.isHot;
    // {} 里面的数据是合并,同名的进行覆盖
    this.setState({ isHot: !isHot })
  }
}

// 2.渲染组件
ReactDOM.render(<Weather/>, document.getElementById("test"))
</script>
</body>

</html>